Protective filter for visual display units



FIG. 1 is a front, top and right side perspective view of a protective filter for visual display units showing my new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a left side elevation view thereof;

FIG. 5 is a right side elevation view thereof;

FIG. 6 is a top plan view thereof;

FIG. 7 is a bottom plan view thereof; and,

FIG. 8 is an enlarged left side elevation view thereof.

The stippled shading and the line shading shown in FIGS. 1-8 represent a contrasting appearance. 

CLAIM The ornamental design for a protective filter for visual display units, as shown. 